Please can someone on here please explain as to why so many collections (especially the big ones) have to name the same bird species differently for example Fulvous tree duck or fulvous whistling duck another one was Eurasian Black Vulture or European Black Vulture or Monk Vulture or Cinereous Vulture I am just using these as examples as there are many, many more out there. I will not name the collections involved but I think most will now which ones anyway. I have seen collections have multiple displays of the same species and yet the signage states two or three in some cases different names. I know there are common names and some not so common but to the average zoo goer they would take this as being different species of birds yet they are the same, so why don’t collections keep to one name for the same species? I have highlighted Birds species because these are what I am interested in but have noticed the same thing with signage on all the other groups of species.